BIAXIALLY ORIENTED ELECTRICAL INSULATING FILM.

摘要

The invention relates to a biaxially oriented electrical insulating film which is constituted of a base layer and at least one cover layer, the base layer containing a mixture from a polypropylene P1 and a polypropylene P2 which is different therefrom, the polypropylene P1 being a linear polypropylene and having an Mw/Mn >5 and a mesopentadene isotactic index of at least 95% and the polypropylene P2 having a long-chain branching.